Horæ subsecivæ: or, Some long-vacation hours redeem’d, for the discovery of the true sal volatile oleosum of the ancient philosophers. Now happily regain’d to the materia medica: and distinguish’d from all other preparations, partly by the senses; but more effectually by its medicinal performances, totally extirpating the saline stem of acids (the root of most diseases) and inferring the volatile oleose temper, the standard of health in humane bodies. By T. Byfield, M.D. and fellow of the College of Physicians in Dublin.